2023-11-07 00:00:00 City of Duvall is a suburb of Seattle with a population over 7,000. Duvall is in King County and is one of the best places to live in Washington. Living in Duvall offers residents a suburban feel and most residents own their homes. In Duvall there are a lot of parks. Many families and young professionals live in Duvall and residents tend to have moderate political views. The public schools in Duvall are above average. The app lets you explore Duvall WA businesses and take self-paced walking tours.